Britney Spears pulled out all the glamour stops for Elton John's 22nd annual Aids Foundation Oscar party in a glittering black gown.
She shimmered and shone in a backless Michael Costello Couture dress, which she paired with Giuseppe Zanotti shoes, a House of Harlow bag, and Lorraine Schwartz jewellery.
She was obviously excited about the bash, tweeting beforehand: "Getting ready to go to Elton and David's party! Love this amazing event that's for a great cause :)"
And she wasn't the only star baring her cleavage, either. Kim Kardashian also took the route of a bust-boosting neckline as she posed for pics with her sisters.
See all red carpet style at Elton's Oscar bash here: